1, beans must be cooked before eating. When beans were boiled for 5 minutes, the saponin yield reached the highest point, and then gradually weakened. After boiling for 20 minutes, the toxin of beans will disappear completely. Usually, beans will be cooked until they are emerald green and soft.

2. Beans, also called cowpeas, are abundant vegetables in summer. It is a cultivated species that can form long pods among cowpea species, and it is an annual winding herb. Alias beans, long-horned beans, ribbon beans, and nepotism beans. Contains various vitamins and minerals. The tender pods are fleshy and crispy, and can also be scalded, cooled or marinated. Pods are long and tubular, crisp and soft, and there are two kinds of white beans and mung beans. When purchasing beans, beans with uniform thickness, bright color, transparency and luster and full seeds are generally preferred, while beans with cracks, wrinkled skin, thin strips without seeds and insect marks on the skin are not suitable for purchase.

3, beans are nutritious and are meat in vegetables. Annual twining, herbaceous lianas or suberect herbs, sometimes with twining tips. Stems subglabrous. Pinnate compound leaves with 3 leaflets; Stipules are lanceolate, about 65438±0cm long, with short spacing and straight lines at the insertion place; Leaflets ovate-rhombic, 5- 15 cm long and 4-6 cm wide, with acute apex, entire or nearly entire margin, sometimes lavender and glabrous.